Determination of Waveform Polarity and Ion Classification by Focusing Properties

2 Determination of Waveform Polarity and Ion Classification BY Focusing Properties 

FAIMS with — F t) polarity. If the maximum of c( d) curve lies within range sampled in the gap, dEc/dE-c would change sign within the gap. That may produce focusing over some Tx range and defocusing at other Tx. While Table 4.2 handles type A and C ions well, the behavior of type B species or those with more complex K E) curves (2.2.3 and 2.5.1) needs further investigation. 

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